Just bought off PeterZekert.... BRK003 a used H89 ported and polished cylinder head with 8mm valve guides, 37mm stainless intake and 31 exhaust. Datsun competition aluminum valve retainers, large diameter dual springs, 10mm rocker tower studs to fit stock rocker towers. 2.825 inch thickness. $750 USD. plus 10mm rocker shaft/tower and roller rockers, all fitted for $1225 AUD landed. Very curious how this head go's !!

Dyno before and after? That would be great for everyone else but expensive for you...

You wont get a before, but definetly a after figure on 1. Im building 3 motors at the same time. 2x a14 and 1x a15. have most of the parts for all except pistons. All blocks have been o-ringed, rods polished etc. Heaps of bolt on goodies.Have 2x 60a and 1x 63 5 speeds behind them.But I am really tempted to have a play at a jayco 4 speed auto or sx 6 speed behind 1 of em. I have given myself a modest budget for this experiment, but just need to find a mad tran builder in Melb willing to have a crack at it.